Tungsten FFS Terminal Vault

Forward-facing sonar changed terminal tackle. Tungsten at 18.5 g/cm³ takes up roughly 39% less volume than lead (11.3 g/cm³) at the same weight and returns a harder sonar echo, so your jighead shows up on LiveScope / ActiveTarget instead of disappearing into the clutter. The vault's jig heads and flipping weights are 97% pure sintered tungsten, matte black oxide, laser-etched with its weight — sold in bulk vault packs, because losing five weights a trip to rock and kelp shouldn't cost retail money.